A compressor is a machine that increases the pressure of a gas by reducing its volumeManufacturing: Air compressors power tools and equipment, and are used in assembly lines and painting and sandblasting. Construction: Air compressors power equipment like nail guns and jackhammers. Automotive: Air compressors are used in car body shops to inflate tires and power air tools. Welding: Air compressors are used in air arc gouging and cutting thick metals. Home: Air compressors are used to inflate tires and sports equipment, and for DIY projects like airbrushing and paint spraying. Refrigeration and air conditioning: Compressors can be used in these applications.